refactor: replace pagination logic with Astro built-in pagination (#376)

src/utils/getPageNumbers.ts

@@ -1,14 +0,0 @@
-import { SITE } from "@config";
-
-const getPageNumbers = (numberOfPosts: number) => {
-  const numberOfPages = numberOfPosts / Number(SITE.postPerPage);
-
-  let pageNumbers: number[] = [];
-  for (let i = 1; i <= Math.ceil(numberOfPages); i++) {
-    pageNumbers = [...pageNumbers, i];
-  }
-
-  return pageNumbers;
-};
-
-export default getPageNumbers;

src/utils/getPagination.ts

@@ -1,35 +0,0 @@
-import { SITE } from "@config";
-import getPageNumbers from "./getPageNumbers";
-
-interface GetPaginationProps<T> {
-  posts: T;
-  page: string | number;
-  isIndex?: boolean;
-}
-
-const getPagination = <T>({
-  posts,
-  page,
-  isIndex = false,
-}: GetPaginationProps<T[]>) => {
-  const totalPagesArray = getPageNumbers(posts.length);
-  const totalPages = totalPagesArray.length;
-
-  const currentPage = isIndex
-    ? 1
-    : page && !isNaN(Number(page)) && totalPagesArray.includes(Number(page))
-      ? Number(page)
-      : 0;
-
-  const lastPost = isIndex ? SITE.postPerPage : currentPage * SITE.postPerPage;
-  const startPost = isIndex ? 0 : lastPost - SITE.postPerPage;
-  const paginatedPosts = posts.slice(startPost, lastPost);
-
-  return {
-    totalPages,
-    currentPage,
-    paginatedPosts,
-  };
-};
-
-export default getPagination;